Retro Remakes are holding a Top Down 2D Dungeon challenge.
Socoder are holding a Remake a Workshop Game challenge.
In a way, these two coincide, since I'd already decided to remake Greenie's Gameboy
(URL "https://socoder.net/index.php?a=15&e=94"><img src="https://socoder.net/workshop/dlds/023/greenie.gif" align="right" />

Platdude. A 16 pixel, 3 color character. Deftly defying the world of 3D models and amazing realism, in favour of good old fashioned gameplay.
Over the years, Platdude has been in plenty of games.. Here's an approximate history of Platdude, along with Downloads where appropriate. (Or skip to the bottom for the latest stuff!)